# Solved papers for AMU Medical AMU Solved Paper-2012

### done AMU Solved Paper-2012

• question_answer1) The total torque about pivot A provided by the forces shown in the figure, for L = 3.0 m, is

A) 210 N-m

B) 140 N-m

C) 95 N-m

D) 75 N-m

• question_answer2) A wheel turning with angular speed of 30 rev/s is brought to rest with a constant acceleration. It turns 60 rev before it stops, the time that elapses before it stop, is

A) 2s

B) 4s

C) 5s

D) 6s

• question_answer3) A rod of length L is composed of a uniform length 1/2 L of wood whose mass is m^ and a uniform length 1/2 L of brass whose mass is ${{m}_{b}}$. The moment of inertia I of the rod about an axis perpendicular to the rod and through its centre is equal to

A) $({{m}_{w}}+{{m}_{b}}){{L}^{2}}/12$

B) $({{m}_{w}}+{{m}_{b}}){{L}^{2}}/6$

C) $({{m}_{w}}+{{m}_{b}}){{L}^{2}}/3$

D) $({{m}_{w}}+{{m}_{b}}){{L}^{2}}/2$

• question_answer4) Consider a satellite orbiting the earth as shown in the figure below. Let ${{L}_{a}}$ and ${{L}_{p}}$ represent the angular momentum of the satellite about the earth when at aphelion and perihelion respectively. Consider the following relations.

 (i) ${{L}_{a}}={{L}_{p}}$ (ii) ${{L}_{a}}=-{{L}_{p}}$ (iii) ${{r}_{a}}\times {{L}_{a}}={{r}_{p}}\times {{L}_{p}}$
Which of the above relation (s) is/are true?

A) (i) only

B) (ii) only

C) (iii) only

D) (i) and (iii)

• question_answer5) A body is projected vertically upward from the surface of the earth with a velocity equal to half the escape velocity. If R is radius of the earth, the maximum height attained by the body is

A) R/6

B) R/3

C) 2R/3

D) R

• question_answer6) The imaginary angular velocity of the earth for which the effective acceleration due to gravity at the equator shall be zero is equal to

A) $1.25\times {{10}^{-3}}$ rad/s

B) $2.50\times {{10}^{-3}}$ rad/s

C) $3.75\times {{10}^{-3}}$ rad/s

D) $5.0\times {{10}^{-3}}$ rad/s

• question_answer7) If an anisotropic solid has coefficients of linear expansion ${{\alpha }_{x}},\,\,{{\alpha }_{y}}$ and ${{\alpha }_{z}}$ for three mutually perpendicular directions in the solid, its coefficient of volume expansion will be

A) ${{({{\alpha }_{x}}\,{{\alpha }_{y}}\,{{\alpha }_{z}})}^{1/3}}$

B) ${{\alpha }_{x}}+{{\alpha }_{y}}+{{\alpha }_{z}}$

C) ${{(\alpha _{x}^{2}+\alpha _{y}^{2}+\alpha _{z}^{2})}^{1/2}}$

D) ${{(\sqrt{{{\alpha }_{x}}}+\sqrt{{{\alpha }_{y}}}+\sqrt{{{\alpha }_{z}}})}^{2}}$

• question_answer8) The terminal speed attained by an aluminium sphere of radius 1 mm falling through water at ${{20}^{o}}C$ will be close to

A) 9.2 m/s

B) 6.9 m/s

C) 4.6m/s

D) 2.3 m/s

• question_answer9) 100 mol of an ideal gas is heated from 10 to ${{20}^{o}}C$ keeping its volume constant pressure constant. Let $\Delta {{U}_{a}}$ and $\Delta {{U}_{b}}$ denote the change in the internal energy of the gas due to process and respectively. Then which of the following shall be true?

A) $\Delta {{U}_{a}}=\Delta {{U}_{b}}$

B) $\Delta {{U}_{a}}>\Delta {{U}_{b}}$

C) $\Delta {{U}_{a}}<\Delta {{U}_{b}}$

D) $\Delta {{U}_{a}}=\Delta {{U}_{b}}=0$

• question_answer10) Refer to the Carnot cycle of an ideal gas shown in the figure. Let ${{W}_{a\to b}},{{W}_{b\to c}},{{W}_{c\to d}}$ and ${{W}_{d\to a}}$represent the work done by the system during the processes $a\to b,\,b\to c,\,c\to d$ and $d\to a$respectively. Consider the following relations

 (i) ${{W}_{a\to b}}+{{W}_{b\to c}}+{{W}_{c\to d}}+{{W}_{d\to a}}>0$ (ii) ${{W}_{a\to b}}+{{W}_{b\to c}}+{{W}_{c\to d}}+{{W}_{d\to a}}<0$ (iii) ${{W}_{a\to b}}+{{W}_{c\to d}}>0$ (iv) ${{W}_{b\to c}}+{{W}_{d\to a}}=0$
Which of the above relation(s) is/are true?

A) (i) and (iii)

B) (iii) and (iv)

C) (i) (iii) and (iv)

D) (ii),(iii) and (iv)

• question_answer11) An ideal gas undergoes a reversible isothermal expansion from a state i to $f$. The change in entropy $\Delta S\,(i\to f)$) is

A) 0

B) > 0

C) < 0

D) not defined for the process

• question_answer12) Water flows in a streamlined manner through a capillary tube of radius a the pressure difference being p and the rate of flow Q. If the radius is reduced to a/2 and the pressure increased to 2p. The rate of flow becomes

A) 4Q

B) Q

C) $\frac{Q}{4}$

D) $\frac{Q}{8}$

• question_answer13) Figure given shows a sinusoidal wave on a string. If the frequency of the wave is 150 Hz and the mass per unit length of the string is 0.2 g/m, the power transmitted by the wave is

A) 2.34 W

B) 3.84 W

C) 4.80 W

D) 5.78 W

• question_answer14) Two closed organ pipes sounded simultaneously given 5 beats per second between the fundamentals. If the shorter pipe is 1.10 m long, the length of the longer pipe is

A) 1.22 m

B) 1.18 m

C) 1.14 m

D) 1.12 m

• question_answer15) The electric field in a certain region is given by$E=5i-3j\,\,kV/m$. The potential difference ${{V}_{B}}-{{V}_{A}}$ between points A and B, having coordinates (4, 0, 3) m and (10, 3, 0) m respectively, is equal to

A) 21kV

B) -21kV

C) 39 kV

D) - 39 kV

• question_answer16) A rod lies along the x-axis with one end at the origin and the other at $x\to \infty$o. it carries a uniform charge $\lambda \,C/m$. The electric field at the point $x=-a$ on the axis will be

A) $E=\frac{\lambda }{4\pi {{\varepsilon }_{0}}a}(-i)$

B) $E=\frac{\lambda }{4\pi {{\varepsilon }_{0}}a}(i)$

C) $E=\frac{\lambda }{2\pi {{\varepsilon }_{0}}a}(-i)$

D) $E=\frac{\lambda }{2\pi {{\varepsilon }_{0}}a}(i)$

• question_answer17) In a parallel-plate capacitor with plate area A and charge Q, the force on one plate because of the charge on the other is equal to

A) $\frac{{{Q}^{2}}}{{{\varepsilon }_{0}}{{A}^{2}}}$

B) $\frac{{{Q}^{2}}}{2{{\varepsilon }_{0}}{{A}^{2}}}$

C) $\frac{{{Q}^{2}}}{{{\varepsilon }_{0}}A}$

D) $\frac{{{Q}^{2}}}{2{{\varepsilon }_{0}}A}$

• question_answer18) Two capacitors, $3\,\mu F$ and $4\,\mu F$, are individually charged across a 6 V battery. After being disconnected from the battery, they are connected together with the negative plate of one attached to the positive plate of the other. What is the final total energy stored

A) $1.26\times {{10}^{-4}}J$

B) $2.57\times {{10}^{-4}}J$

C) $1.26\times {{10}^{-6}}J$

D) $2.57\times {{10}^{-6}}J$

• question_answer19) The given figure shows a spherical Gaussian surface and a charge distribution. When calculating the flux of electric field through the Gaussian surface, the electric field will be due to

A) $+\,\,{{q}_{3}}$ alone

B) $+\,\,{{q}_{1}}$ and $+\,\,{{q}_{3}}$

C) $+\,\,{{q}_{1}},+\,\,{{q}_{3}}$ and $-\,\,{{q}_{2}}$

D) $+\,\,{{q}_{1}}$ and $-\,\,{{q}_{2}}$

• question_answer20) A voltmeter of resistance $280\,\,\Omega$ reads the voltage across the terminals of an old dry cell to be 1.40 V, while a potentiometer reads its voltage equal to 1.55 V. To draw maximum power from the battery, the load resistance must have the value

A) $60\,\,\Omega$

B) $45\,\,\Omega$

C) $35\,\,\Omega$

D) $30\,\,\Omega$

• question_answer21) The electron of a hydrogen atom revolves round the proton in a circular n^ orbit of radius${{r}_{n}}={{\varepsilon }_{0}}{{n}^{2}}{{h}^{2}}/(\pi m{{e}^{2}})$ with a speed ${{v}_{n}}=\frac{{{e}^{2}}}{2{{\varepsilon }_{0}}nh}$. The current due to the circulating charge is proportional to

A) ${{e}^{2}}$

B) ${{e}^{3}}$

C) ${{e}^{5}}$

D) ${{e}^{6}}$

• question_answer22) Six resistances each of value $r=5\,\,\Omega$. are connected between points A, B and C as shown in the figure. If ${{R}_{1}},{{R}_{2}}$ and ${{R}_{3}}$ are the net resistances between A and B, between B and C and between A and C respectively, then${{R}_{1}}:{{R}_{2}}:{{R}_{3}}$ will be equal to

A) 6 : 3 : 2

B) 1 : 2 : 3

C) 5 : 4 : 3

D) 4 : 3 : 2

• question_answer23) Consider the inferences given below in respect of the following current loop of wire kept in a magnetic field B

 (i) The magnitude and direction of force on the element AC of the wire is $\frac{\sqrt{3}}{2}$ ILB directed into the page (ii) The magnitude and direction of force on the element AB of the wire is $\frac{\sqrt{3}}{2}$ ILB directed into the page (iii) The total force on the loop ABCA is zero
Which of the above is/are not true?

A) (i) and (ii)

B) (ii) only

C) (i) and (iii)

D) (ii) and (iii)

• question_answer24) The magnetic field in a certain region of space is given by $B=8.35\times {{10}^{-2}}i\,T$. A proton is shot into the field with velocity$v=(2\times {{10}^{5}}i+4\times {{10}^{5}}j)\,\,m/s$. The proton follows a helical path in the field. The distance moved by proton in the x-direction during the period of one revolution in the yz- plane will be

A) 0.053 m

B) 0.136 m

C) 0.157m

D) 0.236m

• question_answer25) A planar coil having 12 turns carries 15 A current. The coil is oriented with respect to the uniform magnetic field B = 0.2i T such that its directed area is A = 0.04 i ${{m}^{2}}$. The potential energy of the coil in the given orientation is

A) 0

B) + 0.72 J

C) +1.44 J

D) -1.44J

• question_answer26) The adjacent figure shows the cross-section of a long rod with its length perpendicular to the plane of the paper. It carries a constant current flowing along its length. ${{B}_{1}},{{B}_{2}},{{B}_{3}}$ and ${{B}_{4}}$ respectively represent the magnetic fields due to the current in the rod at points 1, 2, 3 and 4 lying at different separations from the centre O, as shown in the figure. Which of the following shall hold true?

A) ${{B}_{1}}>{{B}_{2}}\ne 0$

B) ${{B}_{2}}>{{B}_{3}}\ne 0$

C) ${{B}_{1}}>{{B}_{2}}={{B}_{3}}=0$

D) ${{B}_{3}}>{{B}_{4}}_{3}\ne 0$

• question_answer27) When an AC source of emf E = eq sin (100 O is connected across a circuit, the phase difference between the emf E and the current I is observed to be $\pi /4$, as shown in the figure. If the circuit consists possibly only of R -C or R - L in series, which of the following combinations is possible?

A) $R=1\,k\Omega ,\,\,C=10\,\mu F$

B) $R=1\,k\Omega ,\,\,C=1\,\mu F$

C) $R=1\,k\Omega ,\,\,C=10\,\mu F$

D) $R=1\,k\Omega ,\,\,C=1\,H$

• question_answer28) As shown in the figure, a metal rod makes contact with a partial circuit and completes the circuit. The circuit area is perpendicular to a magnetic field with B = 0.15 T. If the resistance of the total circuit is $3\Omega$, the force needed to move the rod as indicated with a constant speed of 2 m/s will be equal to

A) $3.75\times {{10}^{-3}}N$

B) $2.75\times {{10}^{-3}}N$

C) $6.57\times {{10}^{-4}}N$

D) $4.36\times {{10}^{-4}}N$

• question_answer29) As given in the figure, a series circuit connected across a 200 V, 60 Hz line consists of a capacitor of capacitive reactance $30\,\,\Omega$, a non-inductive resistor of $44\,\,\Omega$. and a coil of inductive reactance $90\,\,\Omega$. and resistance$36\,\,\Omega$. The power dissipate in the coil is

A) 320 W

B) 176 W

C) 144 W

D) 0

• question_answer30) The wave function (in SI unit) for a light wave is given as $\Psi (x,t)={{10}^{3}}\sin \pi (3\times {{10}^{6}}x-9\times {{10}^{14}}t)$ The frequency of the wave is equal to

A) $4.54\times {{10}^{14}}Hz$

B) $3.5\times {{10}^{14}}Hz$

C) $3.5\times {{10}^{10}}Hz$

D) $2.5\times {{10}^{10}}Hz$

• question_answer31) A short linear object of length L lies on the as of a spherical mirror of focal length $f$ at distance u form the mirror. Its image has a axial length L equal to

A) $L{{\left[ \frac{f}{u-f} \right]}^{1/2}}$

B) $L{{\left[ \frac{u+f}{f} \right]}^{1/2}}$

C) $L{{\left[ \frac{u-f}{f} \right]}^{2}}$

D) $L{{\left[ \frac{f}{u-f} \right]}^{2}}$

• question_answer32) An object is placed at a distance of 10 cm from co-axial combination of two lenses A and B contact. The combination forms a real image three times the size of the object. If lens B concave with a focal length of 30 cm. The nature and focal length of lens A is

A) convex, 12 cm

B) concave, 12 cm

C) convex, 6 cm

D) convex, 18 cm

• question_answer33) White light is incident on face AB of agle prism. The path of the green component shown in the figure. If the green light is f totally internally reflected at face AC as shown, the light emerging form face AC will contain

A) yellow, orange and red colours

B) violet, indigo and blue colours

C) all colours

D) all colours except green

• question_answer34) A parallel beam of monochromatic light is incident normally on narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of the slit is

A) zero

B) $\pi /2$

C) $\pi$

D) $2\pi$

• question_answer35) The de-Broglie wavelength of an electron moving with a velocity $1.5\times {{10}^{8}}m/s$is equal to that of a photon. The ratio of the kinetic energy of the electron to the energy of the photon is

A) $\frac{1}{4}$

B) $\frac{1}{2}$

C) 2

D) 4

• question_answer36) The threshold frequency for a certain photosensitive metal is ${{v}_{0}}$. When it is illuminated by light of frequency $v=2{{v}_{0}}$, the maximum velocity of photoelectrons is ${{v}_{0}}$. What will be the maximum velocity of the photoelectron when the same metal is illuminated by light of frequency $v=5{{v}_{0}}$?

A) $\sqrt{2}\,{{v}_{0}}$

B) $2\,{{v}_{0}}$

C) $2\sqrt{2}\,{{v}_{0}}$

D) $4\,{{v}_{0}}$

• question_answer37) A nucleus of mass number 220, initially at rest, emits an $\alpha$-particle. If the Q value of the reaction is 5.5 MeV, the energy of the emitted $\alpha$-particle will be

A) 4.8 MeV

B) 5.4 MeV

C) 5.5 MeV

D) 6.8 MeV

• question_answer38) A radioactive substance emits n beta particles in the first 2 seconds and 0.5 n beta particles in the next 2 seconds. The mean life of the sample is

A) 4s

B) 2 s

C) $\frac{2}{(In\,2)}s$

D) $2\,(In\,2)\,s$

• question_answer39) Which of the following equations correctly represents the temperature variation of energy gap between the conduction and valence bands for Si?

A) ${{E}_{g}}(T)=0.70-2.23\times {{10}^{-4}}T\,eV$

B) ${{E}_{g}}(T)=0.70+2.23\times {{10}^{-4}}T\,eV$

C) ${{E}_{g}}(T)=1.10-3.60\times {{10}^{-4}}T\,eV$

D) ${{E}_{g}}(T)=1.10+3.60\times {{10}^{-4}}T\,eV$

• question_answer40) Which of the following is not a rectifier circuit?

A)

B)

C)

D)

• question_answer41) The following network of gates is equivalent to

A)

B)

C)

D)

• question_answer42) A physical quantity X is given by $X=\frac{2{{k}^{3}}{{l}^{2}}}{m\sqrt{n}}$ The percentage error in the measurements of$k,\,\,\,l,\,\,m$ and n are 1%, 2%, 3% and 4% respectively. The value of X is uncertain by

A) 8%

B) 10%

C) 12%

D) None of these

• question_answer43) A man runs at a speed of 4.0 m/s to overtake a standing bus. When he is 6.0 m behind the door (at t = 0), the bus moves forward and continues with a constant acceleration of$1.2\,\,m/{{s}^{2}}$. The man shall gain the door at time t equal to

A) 5.2 s

B) 4.3 s

C) 2.3 s

D) The man shall never gain the door

• question_answer44) One end of a string of length 1.0 m is tied to a body of mass 0.5 kg. It is whirled in a vertical circle with angular frequency 4 rad/s. The tension in the string, when the body is at the lower most point of its motion, will be equal to (Take $g=10\,\,m/{{s}^{2}}$)

A) 3 N

B) 5 N

C) 8 N

D) 13 N

• question_answer45) Let ${{r}_{1}}\,(t)=3\,t\,i+4{{t}^{2}}j$ and ${{r}_{2}}\,(t)=4\,{{t}^{2}}\,i+3r\,\,j$ represent the positions of particles 1 and 2, respectively, as function of time $t,\,\,{{r}_{1}}(t)$ and ${{r}_{2}}(t)$ are in metre and t in second. The relative speed of the two particles at the instant t = 1 s, will be

A) 1 m/s

B) $3\sqrt{2}\,m/s$

C) $5\sqrt{2}\,m/s$

D) $7\sqrt{2}\,m/s$

• question_answer46) A particle moves in a circular orbit of radius r fc under a central attractive force $F=-\frac{k}{r},\,k$ is constant. The time period of its motion shall be proportional to

A) ${{r}^{1/2}}$

B) r

C) ${{r}^{3/2}}$

D) ${{r}^{2/3}}$

• question_answer47) In the figure given, the system is in equilibrium. What is the maximum value that W can have if the friction force on the 40 N block cannot exceed 12.0 N?

A) 3.45 N

B) 6.92 N

C) 10.35N

D) 12.32 N

• question_answer48) Three blocks, of masses ${{m}_{1}}=2.0,\,\,{{m}_{2}}=4.0$ and ${{m}_{3}}=6.0\,\,kg$ are connected by strings on a frictionless inclined plane of ${{60}^{o}}$, as shown J the figure. A force F = 120 N is applied upward along the incline to the uppermost block, causing an upward movement of the blocks, if connecting cords are light. The values of tensions ${{T}_{1}}$ and in the cords are

A) ${{T}_{1}}=20\,N,\,{{T}_{2}}=60\,N$

B) ${{T}_{1}}=60\,N,\,{{T}_{2}}=60\,N$

C) ${{T}_{1}}=30\,N,\,{{T}_{2}}=50\,N$

D) ${{T}_{1}}=20\,N,\,{{T}_{2}}=100\,N$

• question_answer49) A particle in a certain conservative force field has a potential energy given by $U=20\,\,xy/z$. The force exerted on it is

A) $(20\,y/z)\,i+(20x/z)\,j+(20\,xy/{{z}^{2}})\,k$

B) $-(20\,y/z)\,i-(20x/z)\,j+(20\,xy/{{z}^{2}})\,k$

C) $-(20\,y/z)\,i+(20x/z)\,j-(20\,xy/{{z}^{2}})\,k$

D) $(20\,y/z)\,i+(20x/z)\,j-(20\,xy/{{z}^{2}})\,k$

• question_answer50) A sphere P of mass m and velocity vi undergoes an oblique and perfectly elastic collision with an identical sphere Q initially at rest. The angle $\theta$ between the velocities of the spheres after the collision shall be

A) 0

B) ${{45}^{o}}$

C) ${{90}^{o}}$

D) ${{180}^{o}}$

• question_answer51) The ${{E}^{o}}$ values of the following reduction reactions are given: $F{{e}^{3+}}(aq)+{{e}^{-}}\xrightarrow{{}}F{{e}^{2+}}(aq),\,\,{{E}^{o}}=0.771\,\,V$ $F{{e}^{2+}}(aq)+2{{e}^{-}}\xrightarrow{{}}Fe(s),\,\,\,\,\,\,{{E}^{o}}=-0.447\,\,V$ What will be the free energy change for the reaction? $F{{e}^{3+}}(aq)+3{{e}^{-}}\xrightarrow{{}}Fe(s)$(1F = 96485 C $mo{{l}^{-1}}$)

A) + 18.51 kJ $mo{{l}^{-1}}$

B) +11.87 kJ $mo{{l}^{-1}}$

C) - 8.10 kJ $mo{{l}^{-1}}$

D) - 10.41 kJ $mo{{l}^{-1}}$

• question_answer52) Which is the product of the following reaction${{C}_{6}}{{H}_{5}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-OC{{H}_{3}}\xrightarrow[(ii)\,\,{{H}^{+}}/{{H}_{2}}O]{(i)\,{{C}_{2}}{{H}_{5}}MgBr\,(2\,mol)}$

A) ${{C}_{6}}{{H}_{5}}-C{{H}_{2}}-OH$

B) ${{C}_{6}}{{H}_{5}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}-{{C}_{2}}{{H}_{5}}$

C)

D) ${{C}_{6}}{{H}_{5}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-O{{C}_{2}}{{H}_{5}}$

• question_answer53) The acid which do not contain carboxylic acid group is

A) glutaric acid

B) picric acid

C) stearic acid

D) terephthalic acid

• question_answer54) The aldol condensation reaction is given by

A) acetophenone

B) benzaldehyde

C) benzophenone

D) trichloroacetaldehyde

• question_answer55) Which will undergo ${{\text{S}}_{\text{N}}}\text{2}$reaction faster?

A)

B)

C)

D)

• question_answer56) The main product of the reaction is

A)

B)

C)

D)

• question_answer57) The gas that is adsorbed to a larger extent on charcoal is

A) ${{H}_{2}}$

B) $C{{O}_{2}}$

C) CO

D) $N{{H}_{3}}$

• question_answer58) Consider two half-cells based on the reaction$A{{g}^{+}}(aq)+{{e}^{-}}\xrightarrow{{}}Ag\,(s)$ The left half-cell contains $A{{g}^{+}}$ ions at unit concentration, and the right half-cell initially had the same concentration of $A{{g}^{+}}$ ions, but just enough $NaCl\,\,(aq)$ had been added to completely precipitate the $A{{g}^{+}}\,\,(aq)$ as $AgCl$. If the emf of the cell is 0.29 V, the ${{\log }_{10}}\,\,{{K}_{sp}}$would have been

A) 9.804

B) - 9.804

C) - 4.902

D) 10.004

• question_answer59) Consider the cell,$Pt|{{H}_{2}}(g,\,1\,atm)\,{{H}^{+}}(aq,\,\,1M)||F{{e}^{3+}}(aq),$$F{{e}^{2+}}(aq)|Pt(s)$ Given that ${{E}^{o}}_{F{{e}^{3+}}/F{{e}^{2+}}}=0.771\,\,V$, the ratio of concentration of $F{{e}^{2+}}(aq)$ to $F{{e}^{3+}}(aq)$ is, when the cell potential is 0.830 V.

A) 0.101

B) 0.924

C) 0.120

D) None of these

• question_answer60) If the rate constant of a reaction has the value$k=1.63\times {{10}^{-4}}{{(mol)}^{-\frac{1}{2}}}{{s}^{-1}}$, the order of the reaction is

A) one

B) two

C) zero

D) None of these

• question_answer61) The, following molecule has a linear shape

A) $H_{3}^{+}$

B) $LiH$

C) $N{{H}_{2}}$

D) $O{{H}_{2}}$

• question_answer62) Henrys law constants for aqueous solution of $CO,\,{{O}_{2}},\,C{{O}_{2}}$ and ${{C}_{2}}{{H}_{2}}$ gases are respectively at ${{25}^{o}}C$ as $58\times {{10}^{3}},\,43\times {{10}^{3}},1.61\times {{10}^{3}}$ and$1.34\times {{10}^{3}}$. The solubility of these gases decreases in the order

A) $CO>{{O}_{2}}>C{{O}_{2}}>{{C}_{2}}{{H}_{2}}$

B) ${{O}_{2}}>C{{O}_{2}}>CO>{{C}_{2}}{{H}_{2}}$

C) ${{C}_{2}}{{H}_{2}}>C{{O}_{2}}>{{O}_{2}}>CO$

D) ${{O}_{2}}>C{{O}_{2}}>{{C}_{2}}{{H}_{2}}>CO$

• question_answer63) Ammonia undergoes self-dissociation according to the reaction,$2N{{H}_{3}}(l)N{{H}_{4}}^{+}(am)+NH_{2}^{-}(am)$where am, stands for ammoniated. When 1 mole of $N{{H}_{4}}Cl$ is dissolved in 1 kg of liquid ammonia, the b. p. at 760 tour is observed at $-{{32}^{o}}C$ (Normal b.p. of $N{{H}_{3}}(l)$ is$-{{33.4}^{o}}C$). What conclusions are reached about the nature of the solution?

A) $N{{H}_{4}}Cl$ is completely dissociated in $N{{H}_{3}}$

B) $N{{H}_{4}}Cl$ is partially dissociated in $N{{H}_{3}}$

C) $N{{H}_{4}}Cl$ is not dissociated in $N{{H}_{3}}$

D) Boiling point is not raised

• question_answer64) A reacts to form P. A plot of the reciprocal of the concentration of A vs time is a straight line. When the initial concentration of A is$1.0\times {{10}^{-2}}M$, its half-life is found to be 20 min. When initial concentration of A is $3.0\times {{10}^{-3}}M$ the half-life will be

A) 20 min

B) 40 min

C) 56 min

D) 67 min

• question_answer65) The following is the correct increasing order of the ionic radii

A) $L{{i}^{+}}<M{{g}^{2+}}<{{K}^{+}}<A{{l}^{3+}}$

B) $A{{l}^{3+}}<L{{i}^{+}}<M{{g}^{2+}}<{{K}^{+}}$

C) $A{{l}^{3+}}<M{{g}^{2+}}<{{K}^{+}}<L{{i}^{+}}$

D) ${{K}^{+}}<A{{l}^{3+}}<M{{g}^{2+}}<L{{i}^{+}}$

• question_answer66) In the reaction,$3B{{r}_{2}}+6CO_{3}^{2-}+3{{H}_{2}}O\xrightarrow{{}}5B{{r}^{-}}$$+BrO_{3}^{-}+6\,HCO_{3}^{-}$ Choose the correct statement.

A) Bromine is oxidised and carbonate is reduced

B) Bromine is reduced and carbonate is oxidized

C) Bromine is neither oxidised nor reduced

D) Bromine is both oxidised and reduced

• question_answer67) The normality of 20 volume hydrogen peroxide solution is

A) 3.57 N

B) 0.68 N

C) 5.60 N

D) 5.35 N

• question_answer68) The work done by the gas liberated when 50 g of iron (molar mass 55.85 g $mo{{l}^{-1}}$) reacts with hydrochloric acid in an open beaker at ${{25}^{o}}C$

A) zero

B) - 2.3 kJ

C) 2.2kJ

D) 0.22kJ

• question_answer69) When zeolite is treated with hard water, the sodium ions are exchanged with

A) ${{H}^{+}}$ ions

B) ${{H}^{+}}$ and $C{{a}^{2+}}$ ions

C) $O{{H}^{-}}$ and $M{{g}^{2+}}$ions

D) $C{{a}^{2+}}$ and $M{{g}^{2+}}$ ions

• question_answer70) The decomposition temperature is the lowest for

A) $BeC{{O}_{3}}$

B) $MgC{{O}_{3}}$

C) $SrC{{O}_{3}}$

D) $BaC{{O}_{3}}$

• question_answer71) $Fe{{(OH)}_{3}}$ sol is a

A) macromolecular colloid

B) multimolecular colloid

C) micelles

D) negative colloid

• question_answer72) The chief component of cement that has property of setting quickly and acquiring considerable strength within a few days is

A) tricalcium silicate, $3\,CaO\,.\,\,Si{{O}_{2}}$

B) dicalcium silicate, $2\,CaO\,.\,\,Si{{O}_{2}}$

C) tricalcium aluminate, $3\,CaO\,.\,\,A{{l}_{2}}{{O}_{3}}$

D) All of the above

• question_answer73) All the four sigma bonds in perchlorate ion are

A) $s{{p}^{3}}-s{{p}^{3}}$ bond

B) $s{{p}^{3}}-p$ bond

C) $s{{p}^{3}}-s{{p}^{2}}$ bond

D) $s{{p}^{2}}-p$ bond

• question_answer74) Out of the following electronic arrangements for outer electronic configurations

 (i) (ii) (iii) (iv)
the most stable arrangement is

A) (i)

B) (ii)

C) (iii)

D) (iv)

• question_answer75) The acid strength of the following oxoacids of chlorine is highest

A) $HCl{{O}_{4}}$

B) $HCl{{O}_{3}}$

C) $HCl{{O}_{3}}$

D) $HClO$

• question_answer76) A current of 10.0 A is passed through 1.0 L of M HCl solution for 965 s. pH of the solution at the end of the experiment is

A) 0

B) 0.20

C) 0.8

D) None of these

• question_answer77) Given that the radius of $N{{a}^{+}}$ ion is $0.95\,\overset{o}{\mathop{A}}\,$ and that of $C{{l}^{-}}$ ion is $1.81\,\overset{o}{\mathop{A}}\,$, hence in the close packed lattice of $C{{l}^{-}}$ ions, $N{{a}^{+}}$ ions prefer to occupy

A) tetrahedral site

B) octahedral site

C) cubic site

D) trigonal site

• question_answer78) In $XeO{{F}_{2}}$ molecule, the hybridisation of Xe orbitals is

A) $s{{p}^{3}}{{d}^{3}}$

B) $s{{p}^{3}}{{d}^{2}}$

C) $s{{p}^{3}}d$

D) $s{{p}^{3}}$

• question_answer79) Equivalent weight of potassium permanganate in alkaline solution is equal to m

A) $\frac{1}{5}th$ of the molar mass of $KMn{{O}_{4}}$

B) $\frac{1}{6}th$ of the molar mass of $KMn{{O}_{4}}$

C) $\frac{1}{3}rd$of the molar mass of $KMn{{O}_{4}}$

D) $\frac{1}{10}th$ of the molar mass of $KMn{{O}_{4}}$

• question_answer80) The defect that is more likely to occur in almost all types of ionic crystals is

A) non-stoichiometric defects

B) Schottky defect

C) Frenkel defect

D) All of the above

• question_answer81) Effective atomic number of the central metal ion, Pt, in the complex ${{[Pt{{(N{{H}_{3}})}_{6}}]}^{4+}}$ is: (The atomic no. of Pt is 78)

A) 74

B) 90

C) 86

D) 84

• question_answer82) Compounds, ${{[PtC{{l}_{2}}N{{H}_{3}})}_{4}}]B{{r}_{2}}$ and$[PtB{{r}_{2}}{{(N{{H}_{3}})}_{4}}]C{{l}_{2}}$, shows the following type of isomerism

A) hydrate isomerism

B) ionisation isomerism

D) coordination position isomerism

• question_answer83) ${{[Co{{(CN)}_{6}}]}^{3-}}$, a complex ion of cobalt (III), absorbs radiations in violet region of the visible light. Its aqueous solution, therefore, appears

A) pink

B) orange

C) blue

D) yellow

• question_answer84) A metal crystallizes into a lattice containing a sequence of layers of atoms of ABABAB... What percentage by volume of this lattice has empty space?

A) 74

B) 26

C) 20

D) 16

• question_answer85) The decreasing order of the first ionisation energy (in kJ $mo{{l}^{-1}}$) of He, Mg and Na is$He>Mg>Na$. The increasing order of the 2nd ionisation energy (in kJ $mo{{l}^{-1}}$) of these elements will be

A) $Na<Mg<He$

B) $Mg<Na<He$

C) $Mg<He<Na$

D) $Na<He<Mg$

• question_answer86) To coagulate gelatin sol, which one of the following is most effective?

A) $NaCl$

B) $N{{a}_{3}}P{{O}_{4}}$

C) $AlC{{l}_{3}}$

D) Alcohols

• question_answer87) The most important buffer in the blood consists of

A) $HCl$ and $C{{l}^{-}}$

B) ${{H}_{2}}C{{O}_{3}}$and $HCO_{3}^{-}$

C) ${{H}_{2}}C{{O}_{3}}$ and $C{{l}^{-}}$

D) $HCl$ and $HCO_{3}^{-}$

• question_answer88) Which of the following is not a $\pi$ bonded complex?

A) Zeises salt

B) Ferrocene

C) Dibenzene chromium

• question_answer89) The correct order of basic ties of PhNH2 , $P{{h}_{2}}NH$and Cyclohexyl- $N{{H}_{2}}(C)$ is

A) A > B > C

B) A > C > B

C) C > A > B

D) C > B > A

• question_answer90) Out of following alkenes,

 (I) cis-2-butene (II) Crans-2-butene (III) propene (IV) ethene.
Which is the most stable?

A) I

B) II

C) III

D) IV

• question_answer91) Which of these methods can be used to prepare alcohols?

 I : Hydrolysis of cyanides II : Hydration of olefins III : Reduction of carbonyl compounds

A) I, II and III

B) I and II

C) II and III

D) I and III

• question_answer92) What is the major product of the following reaction?

A)

B)

C)

D)

• question_answer93) The ozonolysis of an olefin gives only propanone. The olefin is

A) but-1-ene

B) but-2-ene

C) 2, 3-dimethylbut-2-ene

D) propene

• question_answer94) The following reaction$C{{H}_{3}}-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,}}\,-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix} | \\ X \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{3}}\xrightarrow[\begin{smallmatrix} KOH \\ -{{H}_{2}},-KBr \end{smallmatrix}]{Alcoholic}$${{H}_{3}}C-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,=\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}$is an example of

A) $\alpha$-elimination

B) $\beta$-elimination

C) Hofmann elimination

D) None of the above

• question_answer95) This reaction is called

A) Etards reaction

B) Stephen reaction

C) Rosenmunds reaction

D) Gattermann-Koch reaction

• question_answer96) Reduction of acetone in the presence of sodium borohydride gives

A) 1-propanol

B) 2-propanol

C) propene

D) n-propane

• question_answer97) Which one of the following compounds cannot be used for the preparation of Grignard reagent?

A) ${{C}_{2}}{{H}_{5}}Br$

B) $HO-C{{H}_{2}}C{{H}_{2}}Cl$

C) ${{C}_{6}}{{H}_{5}}C{{H}_{2}}Cl$

D) $C{{H}_{2}}=CH-C{{H}_{2}}Cl$

• question_answer98) Which one among the following alcohols will give iodoform on treatment with iodine and sodium hydroxide?

A) ${{C}_{6}}{{H}_{5}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,H-{{C}_{6}}{{H}_{5}}$

B) ${{H}_{3}}C-OH$

C) ${{C}_{6}}{{H}_{5}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}$

D) ${{H}_{3}}C-C{{H}_{2}}\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,H-{{C}_{6}}{{H}_{5}}$

• question_answer99) Reaction of propene with diborane followed alkaline hydrolysis in the presence of hydrogen peroxide gives

A) 1-propanol

B) 2-propanol

C) 1, 2-dihydroxypropane

D) n-propane

• question_answer100) Acylation of benzene to produce aliphatic aromatic ketones is known as

A) benzoin condensation

B) hydroformylation

C) Clemmensen reduction

D) Friedel-Crafts reaction

• question_answer101) India has only 2.4% of the worlds land area, its share of the global species diversity is

A) 1.8%

B) 3.1 %

C) 5.1%

D) 8.1%

• question_answer102) Total number of identified biodiversity hot spots in the world are

A) 25

B) 24

C) 40

D) 34

• question_answer103) Kanha National Park is located in ............and is famous for................

C) Odhisa, tiger

D) Asom, elephant

• question_answer104) Loop of Henie is found in

A) lung

B) liver

C) neuron

D) nephron

• question_answer105) One of the following greenhouse gases contributes about 20% of the global warming

A) $C{{H}_{4}}$

B) CFCs

C) $C{{O}_{2}}$

D) ${{N}_{2}}O$

• question_answer106) Biogenetic law as given by Haeckel states that

A) ontogeny recapitulates phylogeny

B) phylogeny recapitulates ontogeny

C) ontogeny and phylogeny go together

D) there is no relationship between phylogeny and ontogeny

• question_answer107) An evolutionary pattern characterized by a rapid increase in the number and kinds of closely related species is called

A) convergent evolution

B) divergent evolution

D) parallel evolution

• question_answer108) The origin of mammal like reptiles occurred in

A) Triassic period

B) Permian period

C) Jurassic period

D) Tertiary period

• question_answer109) Stanley Miller had put the Oparin-Haldane theory to test in 1953 by creating in the laboratory, the probable conditions on the primitive Earth. In the experiment, simple amino acids were synthesized from the following mixtures as observed after 18 days

A) ${{H}_{2}},{{O}_{2}},N$and ${{H}_{2}}O$

B) $C{{H}_{4}},CN,{{H}_{2}}$ and ${{O}_{2}}$

C) ${{H}_{2}},N{{H}_{3}},C{{H}_{4}}$ and water vapour

D) $N{{H}_{3}},C{{H}_{4}}$ and ${{O}_{2}}$

A) a graft between two genetically identical individuals

B) a graft in which a tissue is grafted from one individual to another individual of the same species

C) a graft between individuals of different species

D) tissue grafted from one area to another of the same individual

• question_answer111) The restriction enzyme (s) used in recombinant DNA technology making staggered cuts in DNA leaving sticky ends is/are

A) Eco RI

B) Hind III

C) Barn HI

D) All of these

• question_answer112) If haemoglobin (Hb) of a normal individual and a sickle-cell patient are run in electrophoretic field, they will show

A) same mobilities

B) different mobilities

C) Hb of patient will not move at all

D) Hbs are immobile

• question_answer113) Depending upon the distance between any two genes which is inversely proportional to the strength of linkage, cross overs will vary from

A) 50-100%

B) 0-50%

C) 75-100 %

D) 100-150%

• question_answer114) Inhibition of acetylcholine by DFP (Di-isopropyl-fluorophosphate) is an example of

A) competitive inhibition

B) non-competitive inhibition

C) non-competitive irreversible inhibition

D) allosteric inhibition

• question_answer115) When both alleles of a pair are fully expressed in a heterozygote, they are called

A) lethals

B) co-dominants

C) semi-dominaiits

D) recessive allele

• question_answer116) Nitrogen base + Pentose sugar + Phosphate group is

A) nucleoside

B) nucleotide

C) nucleic acid

D) pyrimidine base

• question_answer117) ............ is a globular protein of $\sim$6 kDa consisting of 51 amino acids, arranged in a 2 polypeptide chains held together by disulphide bridge

A) insulin

B) keratin

C) glucagon

D) fibrinogen

• question_answer118) Which of the following fatty acid is liquid at room temperature?

A) Palmitic acid

B) Stearic acid

C) Oleic acid

D) Linoleic acid

• question_answer119) The energy content in kcal/g of carbohydrate: Protein: triglycerol respectively is approximately in the ratio of

A) 1 : 2 : 2

B) 1 : 2 : 1

C) 2 : 1 : 1

D) 2 : 2 : 1

• question_answer120) The cell membranes of adjacent cells are fused at this cell junction

C) zonula occludens

D) nexus

• question_answer121) One of the following salts predominates in bone matrix

A) sodium chloride

B) magnesium phosphate

C) calcium phosphate

D) sodium carbonate

• question_answer122) Which one of the following species of bee is used for the commercial production of honey?

A) Apis dorsata

B) Apis indica

C) Apis florae

D) Apis mellifera

• question_answer123) Which one of the following is a breed of cattle?

A) Ayreshire

B) Ghagus

D) Scampi

• question_answer124) The falciform ligament in man connects

A) liver with diaphragm

B) lungs with diaphragm

C) stomach with diaphragm

D) liver with stomach

A) Conversion of 11 ci5-retinene to trans- retinene

B) Conversion of trans-retinene into 11-cis- retinene

C) Decomposition of rhodopsin into retinene

D) Decomposition of rhodopsin to scotopsin

• question_answer126) The optic lobes in humans are represented by the corpora

A) bigemina

B) arenacea

C) allata

• question_answer127) The animals that rely on the heat from environment than metabolism to raise their body temperature are, in strict sense, called

A) ectothermic

B) poikilothermic

C) homeothermic

D) endothermic

• question_answer128) Lub sound produced during heart beat is caused by

A) ventricular diastole

B) ventricular systole

C) atrial diastole

D) atrial systole

• question_answer129) which is correct for Turners syndrome?

A) It is a mono so my

B) It causes sterility in females

C) Absence of Barr body

D) All of the above

• question_answer130) Argentaffin cells in human beings are found in

A) small intestine

B) stomach

C) large intestine

D) liver

• question_answer131) In human beings, the three pair of salivary glands and numerous buccal glands produce about

A) 1.0 $d{{m}^{3}}$ of saliva per day

B) 1.5 $d{{m}^{3}}$ of saliva per day

C) 2.0 $d{{m}^{3}}$ of saliva per day

D) 2.5 $d{{m}^{3}}$ of saliva per day

• question_answer132) This gastrointestinal hormone stimulates insulin secretion

A) gastrin

B) CCK

C) secretin

D) GIP

• question_answer133) This is the common passage for bile and pancreatic juices

A) ampulla of Vater

B) ductus Cholidochus

C) duct of Wirsung

D) duct of Santorini

• question_answer134) In the gastro-intestinal tract die Meissners plexus and the Auerbachs plexus occur respectively in the

A) lamina propria and muscularis mucosa

B) submucosa and muscularis externa

C) submucosa and mucosa

D) mucosa and muscularis externa

• question_answer135) The important muscle proteins that help in movement are

A) actin and myosin

B) tropomyosin

C) troponin

D) All of these

• question_answer136) It is a disease which mainly affects mucous membrane of urinogenital tract. In males, burning feeling on passing urine, after a yellow discharge occurs, that is accompanied by fever, headache and feeling of illness

A) syphilis

B) gonorrhea

C) AIDS

D) None of these

• question_answer137) Athletes foot is caused by

A) Tinea pedis

B) Tinea capitis

C) Candida albicans

D) Rickettsia

• question_answer138) Hepatitis-B virus is a

B) variolavirus

C) retrovirus

D) picomavirus

• question_answer139) Immunoglobulins serving as mediators in allergic response are

A) IgE

B) IgD

C) IgM

D) IgA

• question_answer140) One of the group include all sexually transmitted diseases

A) AIDS, syphilis, cholera

B) HIV Malaria, trichomoniasis

C) Gonorrhoea, hepatitis-B, Chlamydiasis

D) Hepatitis-B, Haemophilia, AIDS

• question_answer141) The carrying capacity of environment for a given population can be represented by the following equation

A) $dN=rN-\frac{N}{K}$

B) $\frac{dN}{dt}=rN-\frac{N}{K}$

C) $\frac{dN}{dt}=rN-\frac{1}{K}$

D) $\frac{dN}{dt}=rN\,\,\left( 1-\frac{N}{K} \right)$

• question_answer142) It is normally a rare cancer but became a marker for AIDS/HIV patients

A) squamous cell carcinoma

B) retinoblastoma

C) Kaposfs sarcoma

D) lukaemia

• question_answer143) In fish, Catla catla the specific name is identical with the generic name. Such condition is referred to as

A) autonymy

B) tautonymy

C) synonymy

D) homonymy

• question_answer144) Jaws of shark contain

A) thecodont teeth

B) acrodont teeth

C) pleurodont teeth

D) None of these

• question_answer145) The nerve chord in earthworm originates from

A) supra-pharyngeal ganglia and has a fused pair of ganglia in each segment from the 3rd to the last

B) supra-pharyngeal ganglia and has fused pair of ganglia in each segment from the 4 to the last

C) sub-pharyngeal ganglia and has a fused pair of ganglia in each segment from the 5th to the last

D) sub-pharyngeal ganglia and has a fused pair of ganglia in each segment from the 6th to the last

• question_answer146) In the mouth parts of cockroach, the goba and lacinia form parts of the

A) mandibles

B) maxilla

C) labium

D) labrum

• question_answer147) An aquatic living fossil with ancient origin and many primitive characters, which respires through book gills, is

A) Limulus

B) Cancer

C) Lucifer

D) Daphnia

• question_answer148) Which is the only phylum in the animal kingdom without any nerve cell?

A) Porifera

B) Coelenterata

C) Annelida

D) Nematoda

• question_answer149) Which of the following animal belongs to the phylum-Mollusca?

A) Devil fish

B) Dog fish

C) Silver fish

D) Jelly fish

• question_answer150) If a water body is contaminated with a toxicant, its bio magnification will be more marked in

A) water

B) planktons

C) small fishes

D) birds

A) vessels

B) vessels and tracheids

C) phloem

D) ray parenchymatous cells

• question_answer152) Plant cells normally lack

A) ribosomes

B) Golgi bodies

C) centrioles

D) cell membrane

• question_answer153) Detailed structure of the membrane was studied after the advent of electron microscope during

A) 1930s

B) 1950s

C) 1970s

D) 1990s

• question_answer154) The usual axonemal arrangement of microtubules is

A) 6 pairs of doublets radially arranged at periphery with a pair of centrally located microtubules

B) 6 pairs of doublets radially arranged at periphery with a single centrally located microtubule

C) 9 pairs of doublets radially arranged at periphery with a pair of centrally located microtubules

D) 9 pairs of doublets radially arranged at periphery with a single centrally located microtubule

• question_answer155) When the chromosome has a centromere nearer to one end of the chromosome resulting into one shorter and one longer arm, the chromosome is termed as

A) metacentric

B) sub-metacentric

C) acrocentric

D) telocentric

• question_answer156) Yeast cell can progress through the cell cycle in about

A) 30 min

B) 60 min

C) 90 min

D) 120 min

• question_answer157) The chromosome becomes gradually visible with compaction of chromosomes during the meiotic stage

A) diplotene

B) leptotene

C) zygotene

D) pachytene

• question_answer158) Melvin Calvin was professor of

A) botany

B) plant physiology

C) chemistry

D) biochemistry

A) Mn, Ni and Zn

B) 0, Cu and B

C) Mg, Mn and Mo

D) Ca, S and Fe

A) Water and sucrose

B) Water and minerals

C) Oligosaccharides and hormones

D) None of the above

• question_answer161) Forces generated by transpiration can create pressure sufficient to lift water even upto height of

A) 130 feet

B) 130 metre

C) 230 feet

D) 230 metre

• question_answer162) The essential element needed for water splitting in photosynthesis leading to ${{O}_{2}}$ evolution is

A) Mo

B) Mn

C) Mg

D) K

• question_answer163) In the overall process of photosynthesis, the number of $C{{O}_{2}}$, water, sugar and ${{O}_{2}}$ molecules utilized and produced is

A) 12

B) 13

C) 19

D) 31

• question_answer164) During Calvin cycle the total number of $C{{O}_{2}}$, ATP and NADPH molecules utilized and glucose, ADP and NADP generated is

A) 31

B) 36

C) 61

D) 67

• question_answer165) When fats are respiratory substrate, the value of R.Q. would be about

A) 0.7

B) 1.0

C) more than 1.0

D) None of these

• question_answer166) To speed up the making process in brewing industry, the growth hormone used is

A) auxin

B) gibberellic acid

C) kinetin

D) ethylene

• question_answer167) Glycolysis term has originated form Greek words

A) glycose and lysis

B) glycos and lysis

C) glyco and lysis

D) glucose and lysis

• question_answer168) Banana is vegetatively propagated by

A) tuber

B) rhizome

C) bulb

D) sucker

• question_answer169) The innermost wall layer of microsporangium nourishing the developing pollen grains is known as

A) endodermis

B) endothecium

C) tapetum

D) sporogenous tissue

• question_answer170) The type of pollination when different pollen grains are brought to stigma is

A) geitonogamy

B) cleistogamy

C) xenogamy

D) chasmogamy

• question_answer171) Among the seven pairs of contrasting traits in pea plant, studied by Mendel, the number of traits related to flower, pod and seed respectively was

A) 2, 2, 2

B) 2, 2, 1

C) 1, 2, 2

D) 1, 1, 2

• question_answer172) Crick, one the discoverer of DNA double helical structure, was the man of

A) Physics

B) Chemistry

C) Zoology

D) Botany

• question_answer173) Some of the dominant traits studied by Mendel were

A) round seed shape, constricted pod shape and axial flower position

B) green pod colour, inflated pod shape and axial flower position

C) yellow seed-colour-violet flower colour and yellow pod colour

D) axial flower position, green pod colour and green seed colour

• question_answer174) In a dihybrid cross where two parents differ in two pairs of contrasting traits like seed colour yellow (YY) and seed colour green (yy) with seed shape round (RR) and seed shape wrinkled (rr), the number of green coloured seeds (yy) among sixteen products of ${{F}_{2}}$ generation will be

A) 2

B) 4

C) 6

D) 8

• question_answer175) The number of codons that code different amino acids is

A) 16

B) 31

C) 61

D) 64

• question_answer176) Some amino acids are coded by more than one codon hence, the code is

A) unambiguous

B) degenerate

C) universal

D) initiator

• question_answer177) The colour based contrasting traits in seven contrasting pairs studied by Mendel in pea were

A) 1

B) 2

C) 3

D) 4

• question_answer178) Out of 64 codons, the number of codons with GGG, is

A) 1

B) 2

C) 4

D) 6

• question_answer179) Black rot of crucifers is caused by a

A) fungus

B) bacterium

C) virus

D) None of these

• question_answer180) Pusa Komal variety of cow pea is resistant to disease

A) hill bunt

B) white rust

C) leaf curl

D) bacterial blight

• question_answer181) Lactic acid bacteria (LAB) grow in milk and convert it to curd and also improved its nutritional quality by increasing

A) Vitamin-A

B) Vitamin-${{B}_{12}}$

C) Vitamin-${{B}_{6}}$

D) Vitamin-C and A

• question_answer182) Cohen and Boyer isolated an antibiotic resistance gene, by cutting out a piece of DNA form a plasmid which was responsible for conferring antibiotic resistance, in the year

A) 1962

B) 1965

C) 1972

D) 1982

• question_answer183) Restriction enzyme Eco RI cuts the DNA between bases G and A only when the sequence in DNA is

A) GATATC

B) GAATTC

C) GATTCC

D) GAACTT

• question_answer184) Amplification of gene of interest by using DNA polymerase may go upto

A) 0.1 million times

B) 1.0 million times

C) 1.0 billion times

D) 1.0 trillion times

• question_answer185) The important steps in the process of decomposition are

A) fragmentation and mineralization

B) leaching and catabolism

C) humification and mineralization

D) All the above

• question_answer186) In an ecosystem, at a particular time, standing crop includes

A) total living material

B) total detritus

C) Both (a) and (b)

D) total nutrients present in the crop

• question_answer187) In a pyramid of biomass, if the total dry weight $(kg{{m}^{-2}})$ of primary producers is about 809 it will decrease at tertiary consumer level upto

A) 37 $kg{{m}^{-2}}$

B) 11 $kg{{m}^{-2}}$

C) 5 $kg{{m}^{-2}}$

D) 1.5 $kg{{m}^{-2}}$

• question_answer188) Environment Protection Act, to protect and improve the quality of our environment (air, water and soil) was passed in the year

A) 1971

B) 1974

C) 1981

D) 1986

• question_answer189) In domestic sewage, impurities in the form of suspended solids, colloidal materials and dissolved materials, are about

A) 0.1 %

B) 2.1 %

C) 5.0 %

D) 10.0-%

• question_answer190) The range of bio magnification of DDT.in an aquatic food chain, if starting from 0.003 ppm 10 level in water, may go at fish eating bird level upto

A) 0.5 ppm

B) 5.0 ppm

C) 15.0 ppm

D) 25.0 ppm

• question_answer191) Some organisms are tolerant to a narrow range of salinity and are termed as

A) euryhaline

B) stenohaline

C) (a) neither (b) nor

D) saline

• question_answer192) The biologist who has been called as the Darwin of the 20the century, was

A) Linnaeus

B) Ernst Mayr

C) Diener

D) Whittaker

• question_answer193) The hierarchial arrangement of taxonic categories in descending order is

A) Kingdom, phylum, class, order, family, genus, species

B) Kingdom, division, phylum, order, family, genus, species

C) Kingdom, class, phylum, order, family, genus

D) Division, kingdom, class, phylum, order, family, genus, species

• question_answer194) The shape of the coca bacteria is

A) rod

B) spherical

C) comma

D) spiral

• question_answer195) The beautiful diatoms and desmids are placed under

A) chrysophytes

B) dianoflagellates

C) euglenoids

D) slime moulds

• question_answer196) The major pigments in Rhodophyceae are

A) chlorophyll-a and b

B) chlorophyll-o, c and fucoxanthin

C) chlorophyll-o, d and phycoerythrin

D) None of the above

• question_answer197) When margin of thalamus grows upward enclosing ovary completely and getting fused with it and the other parts of flower arise above the ovary, the flower is said to be

A) hypogynous

B) perigynous

C) epigynous

D) inferior

• question_answer198) When placenta forms a ridge along the ventral suture of the ovary and the ovules are borne on this ridge forming two rows, the placentation is termed as

A) axile

B) parietal

C) marginal

D) basal

• question_answer199) The mesocarp in coconut is

A) flashy

B) stony

C) fibrous

D) milky

• question_answer200) K. Esau dominated the field of plant biology up to the age of 99 years. She contributed mainly in the field of

A) Morphology of flowering plants

B) Classification of flowering plants

C) A natomy of seed plants

D) physiology of seed plants